Commit 9fa0f938 authored by Tails developers's avatar Tails developers
Browse files

doc: Improve the Windows and MAC ISO checking

parent 86c20924
......@@ -126,8 +126,8 @@ download it, use it and share it without restriction.</strong>
<li id="verify-the-iso-option-terminal"><a href="#verify-the-iso-with-terminal">
Using Linux with the command line
</a></li>
<li id="verify-the-iso-option-firefox"><a href="#verify-the-iso-with-firefox">
Using Firefox (easier, all operating systems)
<li id="verify-the-iso-option-others"><a href="#verify-the-iso-with-others">
Using other operating systems
</a></li>
</ul>
......@@ -264,34 +264,84 @@ gpg: BAD signature from "T(A)ILS developers (signing key) <amnesia@boum.org>"
</div>
<div id="verify-the-iso-with-firefox">
<h2><a name="verify-the-iso-with-firefox"></a>Using Firefox (easier, all operating systems)</h2>
<div id="verify-the-iso-with-others">
<h2><a name="verify-the-iso-with-others"></a>Using other operating
systems</h2>
<h3>Using Firefox</h3>
<p>This technique is not using the cryptographic signature as the others
do. We propose it because it's especially easy for Windows users.</p>
<p>Install the CheckIt extension for Firefox available <a
href="https://addons.mozilla.org/en-US/firefox/addon/checkit/">here</a>
and restart Firefox.</p>
<p>Select with your cursor the following checksum (also called
hash):</p>
<p>Here is the checksum (a kind of digital fingerprint) of the ISO
image. Select it with your cursor:</p>
<pre>[[!inline pages="inc/stable_i386_hash" raw="yes"]]</pre>
<p>Right-click on it and choose "Selected hash (256)" from the
<p>Right-click on it and choose "Selected hash (SHA256)" from the
contextual menu:</p>
<p><img src="download/checkit-selected-hash.png" /></p>
<p><img src="download/selected_hash.png"/></p>
<p>From the dialog box that shows up, open the ISO image. Then wait for
the checksum to compute. This will take several seconds during which
your browser will be unresponsive.</p>
<p><strong>If the ISO image is correct</strong> you will get a
notification saying that the checksums match:</p>
<p><img src="download/checksums_match.png"/></p>
<p><strong>If the ISO image is not correct</strong> you will get a
notification telling you that the checksums do not match:</p>
<p><img src="download/checksums_do_not_match.png"/></p>
<h3>Using the cryptographic signature</h3>
<p>GnuPG, a common free software implementation of OpenPGP has versions
and graphical frontends for both Windows and Mac OS X. This also make it
possible to check the cryptographic signature with those operating
systems:</p>
<ul>
<li>[[Gpg4win|http://www.gpg4win.org/]], for Windows</li>
<li>[[GPGTools|http://www.gpgtools.org/]], for Mac OS X</li>
</ul>
<p>You will find on either of those websites detailed documentation on
how to install and use them.</p>
<h3>For Windows using Gpg4win</h3>
<p>After installing Gpg4win, download [[!tails_website tails.key
desc="Tails' key"]].</p>
<p>[[Consult the Gpg4win documentation to import
it|http://www.gpg4win.org/doc/en/gpg4win-compendium_15.html]]</p>
<p>From the dialog box that shows up, open the ISO image:</p>
<p>Then, download the cryptographic signature corresponding to the ISO
image you want to verify:</p>
<ul>
<li><a href=[[!inline pages="inc/stable_i386_sig_url" raw="yes"]]>
[[!inline pages="inc/stable_i386_sig_filename" raw="yes"]]</a></li>
</ul>
<p><img src="download/checkit-select-a-file.png" /></p>
<p>[[Consult the Gpg4win documentation to check the
signature|http://www.gpg4win.org/doc/en/gpg4win-compendium_24.html#id4]]</p>
<p>Wait for the checksum to compute. This should take several seconds
during which your browser will be unresponsive.</p>
<h3>For Mac OS X using GPGTools</h3>
<p>If the ISO is correct you should a message should appear saying
"SHA256 checksums match!":</p>
<p>After installing GPGTools, you should be able to follow the
instruction <a href="#verify-the-iso-with-terminal">using Linux with the
command line</a>. To open the command line, navigate to your
Applications folder, open Utilities, and double click on Terminal.</p>
<p><img src="download/checkit-checksums-match.png" /></p>
</div>
<h2><a name="authenticity-check"></a>So how can I check better the ISO
......
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